Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 60Get this manual
INSP ADJ
MAINTENANCE INTERVAL CHART
MAINTENANCE INTERVAL CHART
The following chart should be considered strictly as guide to general maintenance intervalsDepending on operating conditions, the intervals of maintenance should be changedItem FUEL SYSTEM: Fuel tank and fuel line Fuel filter Fuel cock Carburetor Remarks Initial Every Refer page 3-2 4-5 4-3 4-12 3-3 3-3 3-5 3-5 3-7 3-8 3-9 5-23 3-10 6-6 3-10 3-11 3-11 3-14
10 hours 50 hours 100 hours 200 hours (Break-in) (3 months) (6 months) (1 year)
Inspection InspectionReplacement InspectionReplacement InspectionReplacement